Datasheet

ITAxxB3 Ordering information scheme
Doc ID 11085 Rev 3 5/8
2.1 Design advantage of ITAxxB3 used with 4-point structure
The ITAxxxB3 has been designed with a 4-point structure (separated Input/output) to
efficiently protect against disturbances with very high di/dt rates, such as ESD. The purpose
of this 4-point structure is to eliminate the overvoltage introduced by the parasitic
inductances of the wiring (Ldi/dt).
Efficient protection depends not only on the component itself, but also on the circuit layout.
Figure 9 shows the layout to be used to take advantage of the 4-point structure of the
ITAxxxB3.
With this layout, each line to be protected passes through the protection device. This
approach provides a highly effective interface between the data line and the circuit to be
protected, guaranteeing an isolation between its inputs and outputs.
Figure 9. The 4 point structure
3 Ordering information scheme
Figure 10. Ordering information scheme
U
Chip
Input 1
di/dt
GND
DEVICE TO BE
PROTECTED
GND
Output 1
ITA 25 B 3 RL
Integrated transil array
Breakdown voltage (min)
25 = 25 V
Type of lines protected
B = Bidirectional
Package
3 = SO-20
Packaging
RL = Tape and reel
Blank = Tube